Haiti's catastrophe has killed thousands and destroyed Port-au-Prince, once a jewel in the Caribbean. We look at the architecture past, present and -- possibly -- future in Haiti's heart. Is there a design solution to the desperate need for low-cost housing in overpopulated cities? Can good design trump political mayhem? We hear from experts here and from Haiti: historian Patrick Sylvain, Architecture for Humanity's founder Cameron Sinclair, Global Green's Ted Bardacke, Alejandra Lillo, co-creator of Make It Right, and others.